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2. Eco-Drive - Wikipedia

   en.wikipedia.org/wiki/Eco-Drive

   In 2012 Citizen announced the Eco-Drive RING Concept Model. This watch features a ring-shaped solar cell surrounding the watch case sidewall. [13] [14] In 2018 Citizen announced it developed the Caliber 0100 Eco-Drive prototype autonomous high-accuracy quartz watch movement which is claimed to be accurate to ± 1 second per year. [15]

3. Citizen Watch - Wikipedia

   en.wikipedia.org/wiki/Citizen_Watch

   In 2010, Miyota (Citizen Watch) of Japan introduced a newly developed movement that uses a three-prong quartz crystal torsional resonator, with eight times the vibration frequency of a traditional quartz watch, for the Precisionist or Accutron II line, a new type of quartz watch which is claimed to be accurate to +/− 10 seconds a year and has ...

4. Miyota (watch movement manufacturer) - Wikipedia

   en.wikipedia.org/wiki/Miyota_(watch_movement...

   Miyota produces various 'standard' and 'premium' grade mechanical movements for automatic wristwatches.. The Miyota 8215 is an entry level non-hacking-earlier versions twenty-one jewel three-hand with date automatic wristwatch movement with a uni-directional winding system (left rotation) with an accuracy of -20 to +40 seconds per day, and a power reserve of over 40 hours.

5. Seiko - Wikipedia

   en.wikipedia.org/wiki/Seiko

   In 1978, Seiko introduced the world's first quartz diver's watch with a water resistance of 600 meters; in 1982, the world's first wristwatch with a television; in 1983, the world's first wristwatch with a record-and-play function and an analog quartz chronograph; in 1984, the world's first wristwatch computer; and in 1986, the world's first ...

6. Diving watch - Wikipedia

   en.wikipedia.org/wiki/Diving_watch

   The watches are tested in static or still water under 125% of the rated (water) pressure, thus a watch with a 200 m rating will be water resistant if it is stationary and under 250 m of static water. The testing of the water resistance is fundamentally different from non-dive watches, because every watch has to be fully tested.

7. Water Resistant mark - Wikipedia

   en.wikipedia.org/wiki/Water_Resistant_mark

   Water Resistant is a common mark stamped on the back of wrist watches to indicate how well a watch is sealed against the ingress of water. It is usually accompanied by an indication of the static test pressure that a sample of newly manufactured watches were exposed to in a leakage test.